Russia's great lesbian poet, Sophia Parnok's last poems from the early 1930s were inspired by her final love affair with physicist Nina Vedeneyeva.
One of the few friends of Czar Nicholas II, poet, playwright and family man Grand Duke Konstantin Konstantinovich was also a secret bisexual with a long history of sexual encounters according to his posthumously published diaries.
French author Roger Peyrefitte's 1943 novel Les Amitiés Particulières recounts the thwarted romance between two school boys in a Catholic school between the wars.
Father of the Harlem Renaissance Alain Locke influenced a wide range of writers, artists and musicians. He was also a closeted gay man, which isn't mentioned in most history books.
Danish impressionist writer Herman Bang was the public face of homosexuality late 19th century Copenhagen. Despite his notoriety, he was an influential literary figure in Denmark in his lifetime.
Irish poet and suffragist Eva Gore-Booth was active in fighting for women's rights, worker rights, peace efforts and prison reform. She and her long-term partner Esther Roper also published the early gay-rights magazine Urania in 1916.
Karol Szymanowski was the greatest Polish composer of the first half of the 20th century. The love of his life, Boris Kochno, left him for Dhiagilev.